[Boatanchors] The 100-foot Doublet - was Antenna Question

[Warren Elly]

You could sure save money over DX engineering prices by dealing with wireman... I've been using their 300 ohm twin lead for years...
putting high power through with no issues...  also Coil Winding Specialists  CWS in California will give you relief from more HIGH prices
with excellent high power baluns...6 to 1 is required for 300 ohm twin lead to match 50 ohms....

73, Warren W1GUD
Florida Am Group FLAMGROUP.COM

On Mar 31, 2013, at 6:08 PM, "w5sum" <w5sum at comcast.net> wrote:

> DX Engineering has a fine 300 Ohm Line that will EASILY handle a kilowatt. In fact, I regularly put 1200 watts through mine, and it has never failed. Its window line too, though much smaller than the 450 ohm stuff.
> 
> Ronnie - W5SUM
> ----- Original Message ----- From: "David C. Hallam" <dhallam at knology.net>
> To: <boatanchors at mailman.qth.net>
> Sent: Sunday, March 31, 2013 4:41 PM
> Subject: Re: [Boatanchors] The 100-foot Doublet - was Antenna Question
> 
> 
> There was (is still?) a KW version of 300 ohm TV twin lead available.
> Back in the 60's and early 70's I used it on a number of wire beams. It
> is smaller, about the same width as the regular stuff but thicker and I
> believe had copper clad steel wire. If it is still around, it might be a
> candidate too if you want something around 300 ohm.
> 
> David
> KW4DH
> 
> On 3/31/2013 4:45 PM, Al Klase wrote:
>> You can use 300-ohm TV twin lead up to a couple hundred watts. The 450-ohm "window" line should tolerate most of a full gallon. Start with some extra length. The excess can be hung up in a loose coil away from metal objects. Be prepared to cut off a few feet if you have trouble matching all bands. It might be reasonable to keep an extra piece of feedline handy for extreme cases. I terminate my balanced line with dual-banana plugs. This makes it easy to change connections or plug the line into a grounded jack when not in use.
> 
> -- 
> “One of the evils of democracy is, that you have to put up with the man you elect whether you want him or not.”  Will Rogers
> 
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